A pyrazolopyrimidine that is 1<element>H</element>-pyrazolo[3,4-<ital>d</ital>]pyrimidin-4-amine which is substituted at positions 1 and 3 by tetrahydro-2<element>H</element>-pyran-4-yl and (<ital>m</
ital>-chlorophenoxy)methyl groups, respectively. It is a selective inhibitor of the <greek>epsilon</greek> isoform of casein kinase 1 (CK1<greek>epsilon</greek>). ChEBICHEBI:87237